Adapted for TS

jest.config.js

@@ -13,7 +13,7 @@ module.exports = {
   collectCoverage: true,
   coverageDirectory: '<rootDir>/test/jest/coverage',
   collectCoverageFrom: [
-    '<rootDir>/src/**/*.js'
+    '<rootDir>/src/**/*.ts'
   ],
   coverageReporters: [
     'json-summary',
@@ -28,9 +28,10 @@ module.exports = {
     }
   },
   testMatch: [
-    '<rootDir>/test/__tests__/**/*.spec.js'
+    '<rootDir>/test/__tests__/**/*.spec.ts'
   ],
   moduleFileExtensions: [
+    'ts',
     'js',
     'json'
   ],
@@ -39,7 +40,7 @@ module.exports = {
     '^src/(.*)$': '<rootDir>/src/$1',
   },
   transform: {
-    '.*\\.js$': 'babel-jest',
+    '.*\\.ts$': 'ts-jest',
 
   },
   transformIgnorePatterns: [

package.json

@@ -37,6 +37,8 @@
     "@babel/cli": "^7.6.4",
     "@babel/core": "^7.6.4",
     "@babel/preset-env": "^7.6.3",
+    "@types/jest": "^24.9.0",
+    "@types/ramda": "^0.26.39",
     "babel-eslint": "^10.0.3",
     "babel-jest": "^24.9.0",
     "babel-plugin-transform-relative-paths": "^0.1.0",
@@ -53,6 +55,7 @@
     "lint-staged": "^9.4.2",
     "postinstall-postinstall": "^2.0.0",
     "promise": "^8.0.2",
+    "ts-jest": "^24.3.0",
     "ts-loader": "^6.2.1",
     "typescript": "^3.7.5",
     "webpack": "^4.41.5",